Sword of the Sun S01 E04 OctoMan Strikes Back

"We are elementalists. Hope is priority."

The elementalists return to the HQ to report on Karamu's disappearance to the commander. They are then greeted with 4 new elementalists, one of them being Hikaru, the one who saved Ikate from the missile. The commander then tracks Karamu and sends the elementalists on a mission to fight OctoMan and save Karamu.